Active Autowerke GESI Catted Downpipes - F95 X5M | F96 X6M

For over 30 years, Active Autowerke has set the standard for BMW performance. The new F90 M5 GESI High-Flow Downpipes embody that legacy—engineered to unlock power, reduce heat, and deliver the raw performance your M5 deserves. Crafted in-house in Miami, Florida from premium 304 stainless steel, each downpipe is TIG-welded for strength and precision fitment. A factory-matched 3.5” V-band inlet flows through a high-efficiency, mandrel-bent body for maximum exhaust velocity and quicker turbo spool. The design even retains the OEM O2 sensor heat shield for a clean, stock-like engine bay. Featuring 4.5” GESI Ultra High Output (UHO) catalytic converters, these downpipes offer massive flow gains while staying 49-state EPA compliant and OBD2 safe—all without triggering a CEL. Expect sharper throttle response, a deeper tone, and consistent performance from street to track. Key Features No CEL – guaranteed GESI high-flow cats (EPA & OBD2 compliant, 49 states) 4.5” mandrel-bent piping f